Zeitschrift fur Physikalische Chemie p. 283 - 304 (2001)
Update date:2022-08-18
Topics:
Dobis, Otto
Benson, Sidney W.
The bimolecular reaction: C2H5+Cl2 →4 C2H5Cl+Cl is studied in the very low pressure reactor (VLPR) system at 298 K starting with Cl/C2H6/Cl2 mixtures. Mass conservation is found to be 97±3% for the overall chemical change in the system. From the C2H5Cl product formation kinetics, k4 = (1.05±0.05) · 10-12 cm3/(molecule-s) is derived. Two independent estimates of the A factor gives A4 = 1.3 · 10-12 cm3/(molecule-s). These parameters yield a positive activation energy of 0.13 kcal/mol in contrast with recently reported negative activation energy values. Some side reactions of small extent are initiated by H atom contamination in the system. The measurement of CH3Cl product formed from CH3+Cl2 →11 CH3Cl+Cl gives k11 = (3.4±0.3) · 10-12 cm3/(molecule-s) with an estimated A factor of A11 = 5.0 · 10-12 cm3/(molecules). The source of CH3 radicals is the side reaction H+C2H5 → 2CH3. by Oldenbourg Wissenschaftsverlag, Muenchen.
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